Search Engine Optimization or SEO is a must-have skill for web developers, blogger, Web Content Editor, Writer. Every minute, there are hundreds of new sites created. So if you do not make your site appear on search engines, no body may know your site and it’ll be forgotten and useless. This is must be a disaster for kind of ecommerce, blog sites. So Joomla sites is not an exception. A site ranking must be thought out when you are planning to create a website.

H1 & Alt tags

If you've been around Joomla seo for a while - you will know the importance of the H1 tag. This is one of the most important on-page Joomla and can still be used to directly influence SEO. If you use the H1 correctly, you can have a very postive influence on your search engine rankings. Your page should have only one

As per google algorithm, google spider very much consider on h1 and alt tags for onsite seo, The alt text tags’ purpose is to be displayed when an image is unable to load. Search engines take the alt tag into consideration, so don't forget to add alt tag to your images html.

Create your title tags

Tittle is also a very important item for SEO, or could be the most important. Title tag should be unique for every page ( max 60 chars ). It is possible to override the title using the Page Display Options in the advanced options of menu-items. Using this feature, you will have full control about your menu item titles.Menus >> Menu name >> Menu item >> Page display tab

Use Meta Description

The meta description is used to describe short summary of a page. So that readers can decide whether the page is what they are looking for or looks interesting. Your meta description will have the most impact if it is 160 characters or less in length, including spaces and punctuation. Make them compelling, concise and informative.

When you're writing your meta description, keep in mind the following tips:

• Don’t abuse important keywords
• Do write high quality descriptions.
• Don't repeat information that is in the page title.
• Don't include your site name or URL. value.
• Don't repeat descriptions over multiple pages

Don’t do keyword stuffing

Keyword stuffing is now considered as a strictly black-hat SEO technique. It does tend to have some positive short-term effects, but it’s playing with fire and rarely is beneficial in the long run. Ideally, each page of your website will use three to five keyword phrases, specific to that page.

Optimize anchor text

Optimizing you anchor text is extremely important, especially for your on-site URL's. When building in internal link structure, this is the most important issue to look at. Your anchor text links should contain keywords that describe your article, not something vague such as, read more, click here, etc.

Some recommended Search Engine Optimization extensions are MijoSEF, sh404SEF, and JoomSEF.

www or non-www url’s

If you Joomla site is accessible either with or without a www-prefix is actually also a matter of duplicate URL's. Google ask you to choose one in Webmaster Tools, and it's also important to choose one in Joomla. You can go into Google Webmaster Tools and specify how you want Google to index your site, with or without www. Or you also can set up the redirect in your .htaccess file:
non-www to www redirect:

RewriteEngine On
RewriteCond %{HTTP_HOST} ^mysite.com [NC] RewriteRule ^(.*)$ http://www.mysite.com/$1 [L,R=301]

www to non-www redirect:

RewriteEngine On
RewriteCond %{HTTP_HOST} www.mysite.com
RewriteRule (.*) http://mysite.com/$1 [R=301,L]

Internal and external link

Linking internally is as good as creating backlinks from external websites.

Creating incoming links from other domain is really hard work while for internal links you are able to do it easily – that’s your site. So if you have a page with content relevant to the article you’re writing no wait further link to it internally! - it will improve your rankings.

Linking externally, you might need to usethe rel="nofollow" tag in your links. Too many external links from a page can be bad for SEO, so setting some of them to nofollow can be good.

<a rel="nofollow" href=http://differentdomain.com title=" Text"> Text</a>